The average of 7 consecutive numbers is 20. The largest of these numbers is:

A car travels at 60 km/h for the first 2 hours and 40 km/h for the next 3 hours. What is the average speed of the car?

A shopkeeper offers two successive discounts of 20% and 10%. What is the equivalent single discount?

A sum of ₹2,500 becomes ₹2,975 in 3 years at simple interest. What is the rate of interest?

If 6 men and 8 boys can do a piece of work in 10 days, while 26 men and 48 boys can do the same in 2 days, what is the time taken by 15 men and 20 boys?

Two pipes A and B can fill a tank in 20 minutes and 30 minutes respectively. If both pipes are opened together, how much time will they take to fill the tank?

A cistern has two taps which fill it in 12 and 15 minutes respectively. There is also a waste pipe. When all three are opened, the cistern is filled in 20 minutes. How long will the waste pipe take to empty it?

A shopkeeper sells an article for ₹960 and gains 20%. What was the cost price of the article?

A sum of ₹5,000 becomes ₹6,050 in 2 years at compound interest. What is the annual rate of interest?

The sum of two numbers is 40 and their difference is 4. What is the ratio of the two numbers?

If x:y = 3:4 and y:z = 8:9, what is x:z?

If a certain sum amounts to ₹12,100 in 2 years at 10% compound interest compounded annually, what is the principal sum?

The difference between Simple Interest and Compound Interest on ₹1000 for 2 years at 10% per annum is?

The price of sugar rises by 25%. By how much percent should a household reduce consumption to keep the expenditure same?

In a family of 6, the average age is 25 years. If the youngest member is 5 years old, what was the average age of the family just before his birth?

Find the average of the first five prime numbers.

A sum of money doubles itself in 8 years at simple interest. What is the rate of interest per annum?

A man can do a piece of work in 5 days, but with the help of his son, he can do it in 3 days. In what time can the son do it alone?

A container contains 40 litres of milk. From this container, 4 litres of milk was taken out and replaced by water. This process was repeated further two times. How much milk is now contained in the container?

A train 150m long is running at a speed of 60 km/h. How much time will it take to cross a platform 250m long?